John Grabowski comes up with the most sensible solution:

The power company has instruments that can monitor the power coming into
your home. You can try and demand that they set something up at your
location. Otherwise, contact an electrician who can rent the instruments
and connect it to your service.

There were problems at my house some time ago. Power company hooked up a
recording voltmeter to the line and confirmed voltage spikes. After a lot of
activity at the local substation, the problem was resolved, apparently a near
to failure step down transformer.
In resolving your situation, be sure to consider the possibility of inadequate
grounding. If you install a surge suppressor this will a vital part of the
system
Cheers.

Joe